Illinois Certificate of Error Denial Reason Codes are codes used to identify the reasons for a denial of a Certificate of Error (COE) request in the state of Illinois. A Certificate of Error is a request to have a criminal record expunged or sealed. The Illinois Certificate of Error Denial Reason Codes are used to indicate the specific reason why a COE was denied. The denial reason codes are divided into three categories: “Eligibility,” “Ineligibility,” and “Incomplete/Incorrect Information.” The “Eligibility” category includes codes such as “Ineligible Offense Type,” “Ineligible Offense Date,” and “Ineligible Sentence Type.” This category applies when the offense or sentence type is ineligible for relief. The “Ineligibility” category includes codes such as “Pending Charges,” “Failure to Satisfy Obligations,” and “Petition Denied.” This category applies when the applicant has pending charges, has failed to satisfy all obligations, or the petition was denied by the court. The “Incomplete/Incorrect Information” category includes codes such as “Inaccurate Information,” “Missing Information,” andSingableSignable.” This category applies when the information provided is inaccurate, incomplete, or the document is not singable. Illinois Certificate of Error Denial Reason Codes are an important tool for the Illinois courts to provide clear and concise information regarding why a COE request was denied.